I have a Lenovo Thinkpad T420i 64 bit lap top. It turns out that the key with the Windows Logo is right next to the Left Alt Key and sometimes
when I press the Windows and Tab Key by error the system locks up. It doesn't seem to be totally reproducible as it happens randomly.
I am running Fedora 16 with Gnome3.
--
'Taxes are what we pay for civilized society" --- Oliver Wendell Holmes